Re: Idea for IR zoning with HV

["andy_powell_is" <ukha@xxxxxxx>]

Keith,

Thanks, that makes it clearer... but as you can see from the message 
I sent before this on... when it comes to electronics i seem to get 
everything wrong :(

What I can see is the fact that this would work out a lot cheaper 
than the 250 odd quid asking price for the Homevision expansion 
board, however ... I'm a little scared at poking about with 
homevision's ports, it would be an expensive mistake if I buggered 
it - which makes the 250 odd quid not look too bad considering the 
cost of replacing my Homevision if I killed it.

Andy

--- In ukha_d@y..., "Keith Doxey" <lists.diyha@b...>
wrote:
> Hi Andy,
> 
> simple explanation coming up.....
> 
> The IR LED requires power to emit infra red.
> 
> This power is normally supplied from the IR out jack.
> 
> There are two ways of supplying this power....
> 
> 1. Switching the +5v supply and connecting the LED between that and
a
> permanent ground.
> 2. Supplying a permanent +5v supply and switching the ground.
> 
> Either method will turn the LED Off and On.
> 




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